Under the Affordable Care Act, now in its second week of health care exchange sign-ups, premium costs will vary depending on a number of factors and from state to state. The chart below, from the conservative think tank Heritage Foundation, shows how monthly premiums could change if you switch from your current insurance policy to a policy obtained from an Obamacare exchange.

The numbers in the chart do not include the federal subsidies available to applicants based on their ability to pay. Further, some analysts doubt the credibility of these chart numbers.

"It's really hard to make an apples-to-apples comparison of what is available before and after the exchanges open," said Elise Gould, director of health policy research at Economic Policy Institute, a progressive think tank. "The non-group market is more likely to exclude many provisions that are available in the Obamacare policies, and in some cases people, particularly those with pre-existing conditions, could not find insurance in many states before Obamacare. In other words, you can't put a price on an offer that doesn't exist. Putting together a chart like this may be somewhat misleading; it's just not that credible."

What AFA costs, by state
How monthly premiums will change, on average, for people switching to Obamacare from their current policies, calculated on a state-by-state basis. Heritage Foundation, healthcare.org, state-run exchanges